Evaluation of dietary methionine requirement of male Korean native ducks for 3 weeks post‐hatching |
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| Authors: | Samiru S Wickramasuriya Eunjoo Kim Taeg Kyun Shin Nu Ri Kim Jung Min Heo |
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| Affiliation: | Department of Animal Science and Biotechnology, Chungnam National University, Daejeon, South Korea |
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| Abstract: | A total of 336 1‐day‐old male Korean native ducks (KND) were used in a completely randomized design with seven dietary methionine levels (0.30–0.90% with 0.1% increment) to determine the methionine requirement of male Korean native ducks for 3 weeks after hatching. Each dietary treatment had six replicates with eight ducklings per pen. One duckling from each pen (n = 6) was sacrificed to weigh empty body and drumsticks at the end of the experiment. Final body weight and weight gain of 3 weeks old KND were increased with increasing dietary methionine levels up to 0.4%, and then decreased (P < 0.05) with a further increasing dietary methionine level. In contrast, feed conversion ratio of the KND decreased up to 0.4% and increased (P < 0.05) with the increasing dietary methionine level. Both empty body weight and proportions of empty body weight were linearly increased (P < 0.05) while the dietary methionine level elevated up to 0.4%. Estimated dietary methionine requirement for maximum body weights, daily gain and minimum feed conversion ratio were 0.36, 0.39 and 0.40%, respectively, when it was fitted into linear‐ and quadratic‐plateau models. |
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| Keywords: | Korean native ducklings linear‐plateau model methionine quadratic‐plateau model |
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